CN107851429A - Sonic transducer and the mounting assembly with sonic transducer - Google Patents
Sonic transducer and the mounting assembly with sonic transducer Download PDFInfo
- Publication number
- CN107851429A CN107851429A CN201680040286.3A CN201680040286A CN107851429A CN 107851429 A CN107851429 A CN 107851429A CN 201680040286 A CN201680040286 A CN 201680040286A CN 107851429 A CN107851429 A CN 107851429A
- Authority
- CN
- China
- Prior art keywords
- housing
- sonic transducer
- region
- piezoelectric element
- diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/48—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds
- B60R19/483—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds with obstacle sensors of electric or electronic type
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/521—Constructional features
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/22—Mountings; Casings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2015/937—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles sensor installation details
- G01S2015/938—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles sensor installation details in the bumper area
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
The present invention relates to a kind of sonic transducer (10；10a to 10d), there is housing (15；15a to 15d), the housing is used to receive vibratile piezoelectric element (20) in the housing (15；15a to 15d) interior room (18) in, wherein, the piezoelectric element (20) be arranged to diaphragm element (16；16a) in effect connection, the diaphragm element (16 is abutted in particularly by the piezoelectric element (20)；16a) towards the housing (15；15a to 15d) the interior room (18) side on, wherein, the diaphragm element (16；16a) form the housing (15；15a to 15d) a part.It is arranged according to the present invention, the housing (15；15a to 15d) there is wall thickness (w), from the diaphragm element (16；16a) observed towards the direction of the interior room (18), the wall thickness is in the housing (15；15a to 15d) longitudinal axis (22) direction on since the minimum value in the plane of the piezoelectric element (20) towards the interior room (18) direction increase.
Description
Technical field
The present invention relates to one kind according to claim 1 sonic transducer as described in the preamble.In addition, the present invention relates to one kind
According to the present invention sonic transducer and receiving element between, especially bumper for automotive vehicle construction for pass through openings peace
Fill the mounting assembly in the region of opening.
Background technology
According to claim 1 sonic transducer as described in the preamble as known to the A1 of DE 10 2,009 022 187.It is known
Sonic transducer, which has, is especially configured to tank shape housing deep-draw part, made of aluminum.In the housing, generally by means of bonding
The piezoelectric element for being configured to produce sound wave is fixed on the housing bottom to form diaphragm element by connection.In addition, housing is interior
Room is filled with the material of vibration damping.Thus should especially cause, piezoelectric element only edge when encouraging housing bottom diaphragm element in other words
Desired radiation direction sends vibration.When manufacturing this housing in deep-draw method, vibratile bottom generally has than housing
The wall region around piezoelectric element the small wall thickness of wall thickness.In addition, in usual cylindrical configuration, wall area around piezoelectric element
Wall thickness is constant in domain.
In addition, for example by the A1 of DE 10 2,007 043 500, it is known that in order that the installation position of the construction opening in bumper
Sonic transducer in putting is decoupled, between the housing and construction opening of sonic transducer load be made up of relatively soft material it is decoupled
Ring or the like.The decoupled ring of this outside is delivered in bumper in other words particularly for avoiding sound wave from being propagated in side.Together
When, decoupled ring is also used for preventing from polluting (annular) region that particle or water are entered between construction opening and the housing of sonic transducer
In.
The content of the invention
By described prior art, task of the invention is that so transformation is according to claim 1 preamble institute
The sonic transducer stated so that cancelling by construction opening that is known in the art, being arranged in attaching elements (bumper) and
It can be realized in the case of decoupled ring between the housing of sonic transducer improved decoupled.The vibration of piezoelectric element should especially be avoided
It is delivered in the region of receiving element.
According to the present invention, thus the task solves in the sonic transducer of the feature with claim 1 so that housing has
There is wall thickness, from diaphragm element towards from the direction of interior room, the wall thickness is on the direction of the longitudinal axis of housing from piezoelectric element
Minimum value in plane starts the direction increase towards interior room.
This construction of housing has advantages below：It is in contact with the construction opening of receiving element in housing and makees in other words
In the region arranged with connection, the housing can have relatively large wall thickness, thus at least reduce, preferably avoid shaking completely
Dynamic the problem of being coupled into receiving element.This construction of sonic transducer especially can also be realized, in the periphery of housing and installation
Gap being constructed between opening, especially in a ring is when moisture occurs unlike as possible in the presence of common decoupled ring
Worked in a manner of overhead speaker.On the contrary, moisture or water can independently flow through this gap, so as to avoid moisture or dirt
The accumulation of dye.
Illustrated in the dependent claims according to the favourable expansion scheme of the sonic transducer of the present invention.
On the one hand in order to not reduce the installation room of enclosure interior due to the wall thickness of the increase of housing, and on the other hand it is
It can realize that (in the construction opening, the end face of one side housing is as being used for shell to the construction opening of receiving element for housing
The axial stop of body uses, and another aspect housing with receiving element terminate with flushing in other words by bumper surface) in spy
Do not install not simply, particularly preferably set, housing on the direction that the plane of piezoelectric element move towards with different
Overall diameter, wherein, the overall diameter is minimum in the region of diaphragm element.
In order to realize only put between housing and construction opening shape or it is linear recline and set, housing is at construction opening
Region in there is outer wall on radial direction, wherein, outer wall relative to housing longitudinal axis arrange.This construction is especially
It can realize, receiving element can construct with relatively easy not having cusped edge transition part in other words in the region of construction opening, with
Just realize between housing and construction opening desired shape or linear recline.
If diaphragm element has at least one in the region of the radially outer for the longitudinal axis on diaphragm element
Radially around groove, the wall thickness of diaphragm element reduces in the region of the groove, then realizes and in vibration be delivered to attaching elements
When decoupled further improvement.
In order to particularly simply manufacture this housing with less expense in terms of manufacturing technology, the housing is in diaphragm member
There is different wall in the region in tank shape region in other words, it is also advantageous in this regard that diaphragm element is configured to and shell in the region of part
The separated part of body remainder.In such configuration, diaphragm element especially can also be as set forth above for example with spy
Not simple mode be configured with radially around groove (Sicken) or analogous shape.In addition, thus it is possible that diaphragm element
It can for example be manufactured, or set between diaphragm element and housing remainder attached by different materials with the remainder of housing
The decoupled measure added.
The present invention be also included within it is so far described according to the present invention sonic transducer and receiving element between, especially in machine
The construction of motor vehicle beam is the mounting assembly in the region of the construction opening of pass through openings, wherein, the housing quilt of sonic transducer
Loading is with towards the axial force of the protuberance of construction opening.
In order to cancel decoupled ring, it is preferably provided with herein, the housing of sonic transducer is direct in the region of construction opening
Abut on receiving element.Minimize towards the Vibration propagation in the direction of receiving element and be arranged in other words to optimize,
Reclining between housing and receiving element (only) point shape linear constructs.
It is particularly arranged to construct this shape or linear reclining, receiving element is equipped with the region that reclines a shape
Or linear profile, and housing constructs with reclining region midplane.
In addition, when receiving element is being provided with sinking portion in the region of construction opening on the side towards housing, can
Realize particularly simple positioning of the housing relative to construction opening in other words to center.Thus especially also can be on receiving element
The region that reclines of relative narrowness is constructed, the region that reclines radially is abutted on housing.
Finally, it is possible to, damping element is disposed between receiving element and housing, the damping element axially reclines
On the end face that the plane relative to piezoelectric element of housing is retracted.This damping element with by decoupled ring known in the art
Difference be that damping element is not filled with or be connected across between the construction opening in housing and attaching elements between circular structure
Gap.
Brief description of the drawings
Other advantages, feature and the details of the present invention is drawn by following description of preferred embodiments and referring to the drawings.
Accompanying drawing is shown：
The subregion for the sonic transducer that Fig. 1 shows to load in the construction opening of bumper with vertical section,
Fig. 2 equally shows have in the embodiment of change according to Fig. 1 sonic transducer in housing with vertical section
It is being constructed on wall, radially around breach,
Fig. 3 shows subregion of the housing in the region of diaphragm element with vertical section,
Fig. 4 to Fig. 6 shows other sonic transducers changed in installation site with vertical section respectively, and
Fig. 7 shows the details of the coupling between attaching elements and housing with vertical section.
The element with identical function is provided with identical reference to similar elements in figure in other words.
Embodiment
Figure 1 illustrates the subregion of sonic transducer 10, composition portion of the sonic transducer as driver assistance system
Divide and be used to detect the object arranged in vehicle front or rear and be used for measurement and the distance of the object.Here, it is multiple this
Kind sonic transducer 10 is especially arranged side by side in each construction opening 1 of bumper 100 with the spacing side of restriction each other.It is excellent
Selection of land, the side 11 of sonic transducer 10 are moved towards with flushing with the surface of (outer) surface 2 of bumper 100.
Sonic transducer 10 includes the housing 15 of single type or multi-piece construction, the housing be especially made up of metal such as aluminium and
It is preferred that manufactured in deep-draw method.Housing 15 is at least basic with the diaphragm element 16 for forming side 11, the thickness d of the diaphragm element
On equably construct, and the diaphragm element is worked in the form of vibratile diaphragm.In the inside of the interior room 18 of housing 15,
The piezoelectric element 20 of dish type or plate-shaped configuration is disposed with addition to unshowned electronic installation.Piezoelectric element 20 especially away from
It is connected on the side of interior room 18 preferably by means of bonding connection with diaphragm element 16.In addition, piezoelectric element 20 is with unshowned side
Formula electrically connects with the electronic installation of the response in housing 15.Inside interior room 18, deviate from diaphragm element 16 in piezoelectric element 20
Side on also alternatively set, interior room 18 is filled with the quality 21 of vibration damping, the quality is only partly shown for simplicity reasons.
Observed along the direction of housing longitudinal axis line 22, housing 15 has different diameter regions.In the area of diaphragm element 16
In domain, housing 15 has minimum overall diameter d1.The overall diameter is outer because the outline of the frustoconical configuration of housing 15 is spread to
Diameter d2.It is overall diameter d to occur diameter transition in this region3So that housing 15 is in two overall diameter d2And d3Between transition
In region formed radially around abutment face 23, axially abut in the radial direction ring of construction opening 1 in the abutment face upper shell 15
Around the first protuberance 3 on.Here, axial direction of the housing 15 on the first protuberance 3 recline particularly by it is unshowned, for shell
Body 15 in other words realize by the holding element of sonic transducer 10 or similar component, and the holding element is with towards the direction of the first protuberance 3
Axial force F to sonic transducer 10 carry out power loading.
Especially set, housing 15 has at least approximately constant interior diameter a in the region of interior room 18.Thus, along vertical
The direction observation of axis 22, wall thickness w increase since the plane of piezoelectric element 20 so that wall thickness w is in overall diameter d3Region in
With its maximum.
In the illustrated embodiment, housing 15 is in two overall diameter d1And d3Between region in due to the truncated cone of housing 15
Shape shape and with the outer wall 24 that is in tilted layout with angle [alpha].In addition, construction opening 1 have radially around the second protuberance 4,
Second protuberance is configured to, and construction point shape or linear is reclined on the outer wall 24 of housing 15.
Construction opening 1 is provided with the sinking portion 5 of stepped on the side towards housing 15.Sinking portion 5 and housing 15 it
Between do not form abutting contact (in addition to the region of the first protuberance 3).
The difference of sonic transducer 10a and Fig. 1 shown in figure 2 sonic transducer 10 is that housing 15a is in piezoelectric element
Be configured with 20 plane on the inwall 25 of the housing radially around breach 26.Therefore, in the region of breach 26, housing
15a wall thickness w reduces relative to housing 15 and has its minimum value in the region of breach 26.
Diaphragm element 16a section is shown specifically in figure 3, and the diaphragm element can change instead of diaphragm element 16 in sound
It can be used in device 10,10a.Diaphragm element 16a exemplarily has in the region of radially outer on the side towards interior room 18
Have three relative to housing 15, the coaxial arrangement of longitudinal axis 22 of 15a, channel form recess 27, in the region of these recesses
Diaphragm element 16,16a thickness d reduce.
Figure 4 illustrates sonic transducer 10b, the difference of the sonic transducer and the sonic transducer 10 according to Fig. 1 is, is pasting
Damping element 30 by being disposed with circular structure between face 23 and the first protuberance 3 of construction opening 1, the damping element are maintained at
In housing 15b it is circular structure, radially around groove 31 in.
In the sonic transducer 10c according to Fig. 5, damping element 30a is arranged in housing 15c abutment face 23 and construction opening
Between the inner side 6 of 1 plane.Important is construction opening 1 only has the second protuberance 4, and second protuberance abuts in herein
On the housing 15c outer wall 24 being in tilted layout.
Finally, housing 15d is partly shown in figure 6, the housing constructs to cylindricality in the region shown.Construction opening
1 has the interior seamed edge 7 being in tilted layout, and the interior seamed edge shape is put in the height on the surface 2 of construction opening 1 or linearly abuts in
On housing 15d outer wall 32.
So far described sonic transducer 10,10a to 10d can be altered or modified in many ways, without departing from invention structure
Think.
Claims (12)
1. sonic transducer (10；10a to 10d), there is housing (15；15a to 15d), the housing is used for vibratile piezoelectricity
Element (20) is received in the housing (15；15a to 15d) interior room (18) in, wherein, the piezoelectric element (20) be arranged to
Diaphragm element (16；16a) in effect connection, the diaphragm element (16 is abutted in particularly by the piezoelectric element (20)；
16a) towards the housing (15；15a to 15d) the interior room (18) side on, wherein, the diaphragm element (16；
16a) form the housing (15；15a to 15d) a part,
Characterized in that,
The housing (15；15a to 15d) there is wall thickness (w), from the diaphragm element (16；16a) towards the interior room (18)
Direction is observed, and the wall thickness is in the housing (15；15a to 15d) longitudinal axis (22) direction on from the piezoelectric element (20)
Plane in minimum value start towards the interior room (18) direction increase.
2. sonic transducer according to claim 1,
Characterized in that,
The housing (15；15a to 15d) on the direction that the plane of the piezoelectric element (20) is moved towards have it is different
Overall diameter (d1To d3), wherein, the overall diameter (d1) in the diaphragm element (16；It is minimum in region 16a).
3. the sonic transducer described in claim 1 or 2,
Characterized in that,
The housing (15；15a to 15c) in the region of the piezoelectric element (20) have relative to the longitudinal axis (22) with
The outer wall (24) that angle (α) is in tilted layout.
4. sonic transducer according to any one of claim 1 to 3,
Characterized in that,
The housing (15a) in the plane of the piezoelectric element (20) on the inwall (25) of the housing have radially around
, the breach (26) of channel-shaped.
5. sonic transducer according to any one of claim 1 to 4,
Characterized in that,
The diaphragm element (16a) has at least one radial direction in the region for being arranged in the piezoelectric element (20) radially outer
Circular recess (27), the thickness (d) of the diaphragm element described in the region of these recesses (16a) reduce.
6. sonic transducer according to any one of claim 1 to 5,
Characterized in that,
The diaphragm element (16；16a) it is configured to and housing (15；15a to 15d) the separated part of remainder.
7. mounting assembly, the mounting assembly is in sonic transducer (10 according to any one of claim 1 to 6；10a is extremely
It is 10d) and especially in the construction of bumper for automotive vehicle the receiving element (100) in the region of the construction opening (1) of pass through openings
Between, wherein, the sonic transducer (10；10a to 10d) the housing (15；15a to 15d) by with towards it is described installation open
Axial force (F) loading of the protuberance (3,4) of mouth (1).
8. mounting assembly according to claim 7,
Characterized in that,
The sonic transducer (10；10a；The housing (15 10d)；15a；It is 15d) straight in the region of the construction opening (1)
Connect and abut on the receiving element (100).
9. the mounting assembly according to claim 7 or 8,
Characterized in that,
In the housing (15；15a to 15d) described between the receiving element (100) recline and a shape or linear construct.
10. mounting assembly according to claim 9,
Characterized in that,
The receiving element (100) be equipped with the region to recline have a shape or it is linear, preferably in the protuberance (3,
4) profile of form, and the sonic transducer (10；10a to 10d) the housing (15；15a to 15d) abutting in
Construct with stating the region midplane on receiving element (100).
11. the mounting assembly according to any one of claim 7 to 10,
Characterized in that,
The receiving element (100) is in the region of the construction opening (1) towards the housing (15；15a to 15d) one
Side is provided with sinking portion (5).
12. the mounting assembly according to any one of claim 7 to 11,
Characterized in that,
In the receiving element (100) and the housing (15；15a to 15d) between be disposed with damping element (30；30a), the resistance
Buddhist nun's element axially abuts in the housing (15；15a to 15d) relative to the piezoelectric element (20) plane retract face
(23) on.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015212683.8A DE102015212683A1 (en) | 2015-07-07 | 2015-07-07 | Sound transducer and installation arrangement with a sound transducer |
| DE102015212683.8 | 2015-07-07 | ||
| PCT/EP2016/060345 WO2017005396A1 (en) | 2015-07-07 | 2016-05-09 | Sound transducer and installation assembly comprising a sound transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107851429A true CN107851429A (en) | 2018-03-27 |
| CN107851429B CN107851429B (en) | 2022-03-15 |
Family
ID=55969136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680040286.3A Active CN107851429B (en) | 2015-07-07 | 2016-05-09 | Acoustic transducer and mounting assembly with acoustic transducer |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3320536B1 (en) |
| KR (1) | KR102492092B1 (en) |
| CN (1) | CN107851429B (en) |
| DE (1) | DE102015212683A1 (en) |
| WO (1) | WO2017005396A1 (en) |
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-
2015
- 2015-07-07 DE DE102015212683.8A patent/DE102015212683A1/en not_active Ceased
-
2016
- 2016-05-09 EP EP16722639.8A patent/EP3320536B1/en active Active
- 2016-05-09 KR KR1020187003630A patent/KR102492092B1/en active IP Right Grant
- 2016-05-09 CN CN201680040286.3A patent/CN107851429B/en active Active
- 2016-05-09 WO PCT/EP2016/060345 patent/WO2017005396A1/en active Application Filing
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| EP1083099A1 (en) * | 1999-09-10 | 2001-03-14 | Dr.Ing. h.c.F. Porsche Aktiengesellschaft | Device for holding an ultrasonic transducer on an exterior part of a vehicle |
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| CN101071169A (en) * | 2006-05-09 | 2007-11-14 | 罗伯特·博世有限公司 | Method for adjusting the resonance frequency of an oscillation section for a sensor |
| CN101578652A (en) * | 2007-05-30 | 2009-11-11 | 松下电器产业株式会社 | Ultrasonic receiver |
| DE102009006030A1 (en) * | 2009-01-24 | 2010-07-29 | Volkswagen Ag | Sound sensor i.e. ultrasonic sensor, arrangement for use on rear side of component e.g. bumper, of motor vehicle, has two regions comprising thickness gaps, ramp and slots that cause impedance difference in arrangement |
| CN102859580A (en) * | 2010-04-15 | 2013-01-02 | 罗伯特·博世有限公司 | Method for driving an ultrasound sensor and ultrasound sensor |
| DE102010044997A1 (en) * | 2010-09-10 | 2012-03-15 | Valeo Schalter Und Sensoren Gmbh | Bumper arrangement for motor vehicle, has ultrasonic sensor, which is arranged in bumper, where ultrasonic sensor is installed in recess of bumper |
| CN103109202A (en) * | 2010-09-18 | 2013-05-15 | 法雷奥开关和传感器有限责任公司 | Arrangement having a bumper and an ultrasonic sensor and vehicle having such an arrangement |
| CN103501922A (en) * | 2011-03-22 | 2014-01-08 | 皇家飞利浦有限公司 | Ultrasonic cmut with suppressed acoustic coupling to the substrate |
| CN104541180A (en) * | 2012-05-31 | 2015-04-22 | 罗伯特·博世有限公司 | Ultrasound sensor and device and method for measuring a distance between a vehicle and an obstacle |
| CN104603870A (en) * | 2012-06-27 | 2015-05-06 | 罗伯特·博世有限公司 | Acoustic sensor with a diaphragm made of a composite fiber material |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3320536B1 (en) | 2019-11-06 |
| WO2017005396A1 (en) | 2017-01-12 |
| DE102015212683A1 (en) | 2017-01-12 |
| EP3320536A1 (en) | 2018-05-16 |
| KR102492092B1 (en) | 2023-01-27 |
| CN107851429B (en) | 2022-03-15 |
| KR20180028475A (en) | 2018-03-16 |
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